java之struts2的action的创建方式

public class HelloAction1 {
    public String hello(){
        System.out.println("无侵入性创建Action的方法");
        return Action.SUCCESS;
    }
}

public class HelloAction2 extends ActionSupport{
    public String hello(){
        System.out.println("使用继承ActionSupport创建Action");
        return Action.SUCCESS;
    }
}

public class HelloAction3 implements Action{

    @Override
    public String execute() throws Exception {
        System.out.println("使用实现Action接口的方式来创建action");
        return Action.SUCCESS;
    }
    
}